• 한국멀티미디어학회논문지
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• 제22권4호
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• pp.480-490
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• 2019

Nowadays, Electronic Medical Record (EMR) has just implemented at few hospitals for Outpatient Department (OPD). OPD is the diversified data, it includes demographic and diseases of patient, so it need to be clustered in order to explore the hidden rules and the relationship of data types of patient's information. In this paper, we propose a novel approach for unsupervised clustering of patient's demographic and diseases in OPD. Firstly, we collect data from a hospital at OPD. Then, we preprocess and transform data by using powerful techniques such as standardization, label encoder, and categorical encoder. After obtaining transformed data, we use some strong experiments, techniques, and evaluation to select the best number of clusters and best clustering algorithm. In addition, we use some tests and measurements to analyze and evaluate cluster tendency, models, and algorithms. Finally, we obtain the results to analyze and discover new knowledge, meanings, and rules. Clusters that are found out in this research provide knowledge to medical managers and doctors. From these information, they can improve the patient management methods, patient arrangement methods, and doctor's ability. In addition, it is a reference for medical data scientist to mine OPD dataset.

• 한국균학회지
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• 제47권2호
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• pp.125-130
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• 2019

A fungal isolate, designated KNU-JJ-1824, was isolated from a soil sample collected from a field on Jeju, Korea. Colonies of the isolates cultured on PDA, MEA and CMAD for 14 days grew to diameters of 49~51 mm, 60~63 mm, and 47~50 mm, respectively. The colonies of this fungal isolate were dark green in color on both sides, and had irregular margins on the PDA media. Mycelia submerged and exhibited clear lines from the center to the edge on MEA media. On CMAD media, they were dark brown to greenish-brown, with narrow white margins. The shape of the conidia was guttulate, fusiform or clavate, and $1.9{\sim}3.4{\times}6.5{\sim}10.2{\mu}m$ in size. A molecular phylogenetic tree was constructed using dataset from small subunit (SSU) rDNA and the internal transcribed spacer (ITS) regions, and the isolate was found to cluster with Scleroconidioma sphagnicola UAMH 9731. Based on the results of the phylogenetic tree analysis and the cultural and morphological characteristics, the isolate was identified as Scleroconidioma sphagnicola. We report S. sphagnicola for the first time in Korea.

• 대한의용생체공학회:의공학회지
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• 제45권1호
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• pp.1-9
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• 2024

Communication with others plays an important role in human social interaction and information exchange in modern society. However, some individuals have difficulty in communicating due to dysarthria. Therefore, it is necessary to develop effective diagnostic techniques for early treatment of the dysarthria. In the present study, we propose a mobile device-based methodology that enables to automatically classify dysarthria type. The light-weight CNN model was trained by using the open audio dataset of Korean patients with dysarthria. The trained CNN model can successfully classify dysarthria into related subtype disease with 78.8%~96.6% accuracy. In addition, the user-friendly mobile application was also developed based on the trained CNN model. Users can easily record their voices according to the selected inspection type (e.g. word, sentence, paragraph, and semi-free speech) and evaluate the recorded voice data through their mobile device and the developed mobile application. This proposed technique would be helpful for personal management of dysarthria and decision making in clinic.

• 전자공학회논문지
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• 제50권3호
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• pp.179-186
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• 2013

PAC는 디지털 의료영상을 위한 의료 시스템이며 PACS가 공용 네트워크를 이용한 웹 기반 서비스로 확장 될 수 있다. 이 경우 DICOM 파일은 개인의무기록을 포함하고 있기 때문에 악의적 사용자의 공격으로부터 보호되어야 한다. 그 위험성을 해결하기 위하여 우리는 유연한 IPSec을 이용하는 보안전송 시스템을 설계하였고, 웹 기반의 3차원 의료영상 시스템에 적용하였다. 그리고 대용량 DICOM 데이터 전송 시 적용되는 암호화 및 무결성 알고리즘을 변경하며 개발 된 시스템의 성능평가를 수행하였다. 이 때, 사용 된 알고리즘의 조합은 DES-MD5, DES-SHA1, 3DES-MD5, 그리고 3DES-SHA1이며, 암호화 전송은 실험을 위한 테스트베드에서 수행하였다. 실험 결과, 암호화를 적용하지 않은 경우에 비교하여 전반적으로 암호화 알고리즘에 의하여 영향을 받았다. DES의 경우 약 50%의 전송성능 저하를 보였으며, 3DES의 경우 약 65%의 전송성능 저하를 보였다. 또한 DICOM 볼륨데이터 전송 시 패킷 증가에 의한 오버헤드로 인한 네트워크 성능 감소가 발생함을 확인하였다. 결론적으로, 보안전송 시스템에 의한 메시지의 안전한 교환을 보장하기위한 서버 및 네트워크 성능의 저하가 발생하였다. 따라서 반드시 보호 되어야 할 의료영상에 대해서만 보안전송을 구성한다면 서버의 성능 저하 문제를 해결함과 동시에 안전한 웹 PACS를 구성 할 수 있을 것이다.

• 기록학연구
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• 제75호
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• pp.41-89
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• 2023

2007년 ｢대통령기록물법｣ 제정 이후, 16대 노무현 정부의 대통령 전자기록물 이관 사례는 공공기록물 관리에 있어 첨병으로써의 역할과 새로운 전자기록물 관리의 테스트 베드로써의 역할을 수행했었다. 19대 문재인 정부의 대통령 전자기록물을 이관할 때에는 16대 때의 전자기록물 이관방식을 계승하되, 몇 가지 혁신적인 시도가 있었다. 대통령기록관은 처음으로 대통령자문기관의 전자문서를 장기보존패키지로 변환한 후 온라인으로 이관 받았고, 데이터의 특성을 고려하여 대통령 기록물생산기관의 행정정보 데이터세트를 SIARD 규격으로 이관을 받았다. 그리고 대통령기록관은 웹사이트를 OVF 형태로 시범적으로 이관 받았으며, 소셜미디어를 API를 통해 직접 수집하였다. 이와 같이 이 연구는 16대 노무현 정부 때부터 19대 문재인 정부 때까지 대통령 전자기록물 이관방식과 관련한 변천과정을 조사하였다. 그리고 19대 문재인 정부의 대통령 전자기록물 유형별 이관방식을 중심으로 주요성과 및 문제점을 분석하여 향후 개선방안을 제시하였다.

• Earthquakes and Structures
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• 제7권2호
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• pp.141-157
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• 2014

The Conditional Mean Spectrum represents a powerful link between the seismic hazard information and the selection of strong ground motion records at a particular site. The scope of the paper is to apply for the city of Bucharest for the first time the method to obtain the Conditional Mean Spectrum (CMS) presented by Baker (2011) and to select, on the basis of the CMS, a suite of strong ground motions for performing elastic and inelastic dynamic analyses of buildings and structures with fundamental periods of vibration in the vicinity of 1.0 s. The major seismic hazard for Bucharest and for most of Southern and Eastern Romania is dominated by the Vrancea subcrustal seismic source. The ground motion prediction equation developed for subduction-type earthquakes and soil conditions by Youngs et al. (1997) is used for the computation of the Uniform Hazard Spectrum (UHS) and the CMS. The disaggregation of seismic hazard is then performed in order to determine the mean causal values of magnitude and source-to-site distance for a particular spectral ordinate (for a spectral period T = 1.0 s in this study). The spectral period of 1.0 s is considered to be representative for the new stock of residential and office reinforced concrete (RC) buildings in Bucharest. The differences between the Uniform Hazard Spectrum (UHS) and the Conditional Mean Spectrum (CMS) are discussed taking into account the scarcity of ground motions recorded in the region of Bucharest and the frequency content characteristics of the recorded data. Moreover, a record selection based on the criteria proposed by Baker and Cornell (2006) and Baker (2011) is performed using a dataset consisting of strong ground motions recorded during seven Vrancea seismic events.

• 보건행정학회지
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• 제25권1호
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• pp.22-30
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• 2015

Background: This study investigated the health behaviors of North Korean, multicultural, and Korean family adolescents in Korea. Methods: The study subjects were from the Korea youth risk behavior web-based survey (2011-2013) dataset. We identified 1,954 multicultural family adolescents and twice as many Korean family adolescents. Frequency analysis was used to assess nativity and nationality of the parents, and the chi-square test was used to compare the general characteristics and health behavior of the multicultural and Korean families. Conditional multiple logistic regression was used to compare health behavior between multicultural and Korean families. Results: Of the 5,862 multicultural and Korean family adolescents, current smoking in North Korean family adolescents was higher than Korean family adolescents (adjusted odds ratio [aOR], 2.32; 95% confidence interval [CI], 1.60-3.35) after adjusting for sex, school year, perceived school record, family structure, father's education, mother's education, perceived economic status, place of residence, and survey year. A high drinking rate was significantly greater in North Korean family adolescents compared to Korean family adolescents (aOR, 2.94; 95% CI, 1.89-4.57). Odds ratios for sufficient physical activity of vigorous intensity (aOR, 1.82; 95% CI, 1.31-2.54) were significantly higher in North Korean family adolescents than in Korean family adolescents. Fast food intake (aOR, 1.96; 95% CI, 1.34-2.86) was significantly higher in North Korean family adolescents compared to Korean family adolescents. Conclusion: There were differences in health behavior between North Korean, multicultural, and Korean family adolescents. Further studies are needed to investigate the factors associated with these differences.

• 한국전자통신학회논문지
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• 제8권6호
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• pp.971-977
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• 2013

본 연구는 청소년건강행태 온라인조사 자료를 토대로 고등학생의 인구사회학적 특성 및 일탈행동요인에 따른 스트레스 수준의 차이를 t-검증과 F-검증을 통해 비교하였다. 연구결과, 인구학적 특성 요인에 있어서는 여학생이 남학생보다, 양 부모와 동거하지 않는 경우에, 가계의 경제수준이 낮은 경우에, 전문계 고등학생의 경우에, 고학년인 경우에, 학업성적이 낮은 경우에, 일탈행동요인에 있어서는 인터넷 중독인 경우에, 문제음주를 한 경우에, 흡연을 한 경우의 고등학생이 그렇지 않은 경우에 비해 통계학적으로 유의하게 높은 스트레스 수준을 보였다. 본 연구에서는 이러한 결과를 토대로 고등학생의 스트레스 완화 방안에 대해 논의하였다.

• 한국전자통신학회논문지
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• 제8권6호
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• pp.963-969
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• 2013

본 연구는 제5차 청소년건강행태 온라인조사 자료를 통해 중고생의 인구학적 특성, 건강, 인터넷 중독 요인에 따른 약물사용의 차이를 비교하고자, 첫째, 각 변인에 대한 빈도분석, 백분율, 평균 등의 기술 통계분석을 진행하였으며, 둘째, 각 독립변인에 따른 약물사용 여부의 차이를 고찰하고자 카이자승 검증을 진행하였다. 연구결과를 정리하면, 인구학적 특성 요인에 있어서는 남학생이 여학생보다, 부모와 동거하지 않는 경우에, 가계의 경제수준이 높은 경우에, 중학생의 경우에, 성적이 낮은 경우에, 건강 요인에서는 주관적으로 건강하지 못하다고 느끼는 경우에, 주관적으로 행복하지 못하다고 느끼는 경우에, 스트레스정도가 낮은 경우에, 우울을 경험한 경우에, 그리고 인터넷 중독 요인에 있어서는 인터넷 중독인 경우에 그렇지 않은 경우에 비해 통계학적으로 유의한 수준에서 높은 약물사용 빈도를 보이는 것으로 나타났다. 이상의 결과를 토대로 본 연구에서는 중고생의 약물 사용에 대한 예방과 대책에 대해 논의를 진행하였다.

• 한국농공학회논문집
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• 제62권2호
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• pp.39-52
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• 2020

A high quality, long-term, high-resolution precipitation dataset is an essential in climate analyses and global water cycles. Rainfall data from station observations are inadequate over many parts of the world, especially North Korea, due to non-existent observation networks, or limited reporting of gauge observations. As a result, satellite-based rainfall estimates have been used as an alternative as a supplement to station observations. The Climate Hazards Group Infrared Precipitation (CHIRP) and CHIRP combined with station observations (CHIRPS) are recently produced satellite-based rainfall products with relatively high spatial and temporal resolutions and global coverage. CHIRPS is a global precipitation product and is made available at daily to seasonal time scales with a spatial resolution of 0.05° and a 1981 to near real-time period of record. In this study, we analyze the applicability of CHIRPS data on the Korean Peninsula by supplementing the lack of precipitation data of North Korea. We compared the daily precipitation estimates from CHIRPS with 81 rain gauges across Korea using several statistical metrics in the long-term period of 1981-2017. To summarize the results, the CHIRPS product for the Korean Peninsula was shown an acceptable performance when it is used for hydrological applications based on monthly rainfall amounts. Overall, this study concludes that CHIRPS can be a valuable complement to gauge precipitation data for estimating precipitation and climate, hydrological application, for example, drought monitoring in this region.